It was just a week ago that SECRET announced bandmate Zinger's recovery and return date to the stage.
But the rapper has had to delay her comeback, after doctors advised her to continue resting.
"She is feeling okay but the doctor was the one to give the final okay, and he said her rib injuries haven't fully healed yet," a source tells IdolWow!.
The 22-year-old was due to appear with the group at the Golden Disc Awards in Malaysia on January 15, but TS Entertainment confirm her return has been postponed.
She tweeted last night: "I'm sorry. After making a fully recovery I will make my return. I want to show performances where I am enjoying them. You know what I mean, right?
"Please sent more encouragements to my other three members who are filling my empty position, K? Thank you and thank you again."
The rest of the SECRET girls will perform as a trio in Kuala Lumpur this week.
Zinger was involved in a car accident with her bandmates on December 11. While the others escaped unharmed, the "Poison" star was treated for a bruised lung and a broken rib.
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